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Some cleanups, some size reductions and some buffer overflow checks

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Most of it based on ideas from vodz
This commit is contained in:
Robert Griebl 2002-05-22 23:34:35 +00:00
parent 94a6a956f0
commit 236abbfd71
1 changed files with 42 additions and 60 deletions
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102
modutils/modprobe.c
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@ -37,7 +37,8 @@ struct mod_list_t {
};
static struct dep_t *depend = 0;
static struct dep_t *depend;
static int autoclean, show_only, quiet, do_syslog, verbose;
static struct dep_t *build_dep ( void )
@ -52,6 +53,11 @@ static struct dep_t *build_dep ( void )
if ( uname ( &un ))
return 0;
// check for buffer overflow in following code
if ( xstrlen ( un. release ) > ( sizeof( buffer ) - 64 ))
return 0;
strcpy ( filename, "/lib/modules/" );
strcat ( filename, un. release );
strcat ( filename, "/modules.dep" );
@ -160,7 +166,7 @@ static struct dep_t *build_dep ( void )
}
static int mod_process ( struct mod_list_t *list, int do_insert, int autoclean, int quiet, int do_syslog, int show_only, int verbose )
static int mod_process ( struct mod_list_t *list, int do_insert )
{
char lcmd [256];
int rc = 0;
@ -196,8 +202,6 @@ static void check_dep ( char *mod, struct mod_list_t **head, struct mod_list_t *
if (( mod [lm-2] == '.' ) && ( mod [lm-1] == 'o' ))
mod [lm-2] = 0;
//printf ( "check_dep: %s\n", mod );
// search for duplicates
for ( find = *head; find; find = find-> m_next ) {
if ( !strcmp ( mod, find-> m_module )) {
@ -213,8 +217,6 @@ static void check_dep ( char *mod, struct mod_list_t **head, struct mod_list_t *
else
*tail = find-> m_prev;
//printf ( "DUP\n" );
break; // there can be only one duplicate
}
}
@ -247,7 +249,7 @@ static void check_dep ( char *mod, struct mod_list_t **head, struct mod_list_t *
static int mod_insert ( char *mod, int argc, char **argv, int autoclean, int quiet, int do_syslog, int show_only, int verbose )
static int mod_insert ( char *mod, int argc, char **argv )
{
struct mod_list_t *tail = 0;
struct mod_list_t *head = 0;
@ -258,10 +260,14 @@ static int mod_insert ( char *mod, int argc, char **argv, int autoclean, int qui
if ( head && tail ) {
int i;
int l = 0;
// append module args
head-> m_module = xmalloc ( 256 );
strcpy ( head-> m_module, mod );
l = xstrlen ( mod );
for ( i = 0; i < argc; i++ )
l += ( xstrlen ( argv [i] ) + 1 );
head-> m_module = xstrndup ( mod, l );
for ( i = 0; i < argc; i++ ) {
strcat ( head-> m_module, " " );
@ -269,7 +275,7 @@ static int mod_insert ( char *mod, int argc, char **argv, int autoclean, int qui
}
// process tail ---> head
rc |= mod_process ( tail, 1, autoclean, quiet, do_syslog, show_only, verbose );
rc |= mod_process ( tail, 1 );
}
else
rc = 1;
@ -277,7 +283,7 @@ static int mod_insert ( char *mod, int argc, char **argv, int autoclean, int qui
return rc;
}
static void mod_remove ( char *mod, int do_syslog, int show_only, int verbose )
static void mod_remove ( char *mod )
{
static struct mod_list_t rm_a_dummy = { "-a", 0, 0 };
@ -289,38 +295,35 @@ static void mod_remove ( char *mod, int do_syslog, int show_only, int verbose )
else // autoclean
head = tail = &rm_a_dummy;
if ( head && tail ) {
// process head ---> tail
mod_process ( head, 0, 0, 0, do_syslog, show_only, verbose );
}
if ( head && tail )
mod_process ( head, 0 ); // process head ---> tail
}
extern int modprobe_main(int argc, char** argv)
{
int ch, rc = 0;
int loadall = 0, showconfig = 0, debug = 0, autoclean = 0, list = 0;
int show_only = 0, quiet = 0, remove_opt = 0, do_syslog = 0, verbose = 0;
char *load_type = NULL, *config = NULL;
int opt;
int remove_opt = 0;
while ((ch = getopt(argc, argv, "acdklnqrst:vVC:")) != -1)
switch(ch) {
case 'a':
loadall++;
autoclean = show_only = quiet = do_syslog = verbose = 0;
while ((opt = getopt(argc, argv, "acdklnqrst:vVC:")) != -1) {
switch(opt) {
case 'c': // no config used
case 'l': // no pattern matching
return EXIT_SUCCESS;
break;
case 'c':
showconfig++;
break;
case 'd':
debug++;
case 'C': // no config used
case 't': // no pattern matching
error_msg_and_die("-t and -C not supported");
case 'a': // ignore
case 'd': // ignore
break;
case 'k':
autoclean++;
break;
case 'l':
list++;
break;
case 'n':
show_only++;
break;
@ -333,55 +336,34 @@ extern int modprobe_main(int argc, char** argv)
case 's':
do_syslog++;
break;
case 't':
load_type = optarg;
break;
case 'v':
verbose++;
break;
case 'C':
config = optarg;
break;
case 'V':
default:
show_usage();
break;
}
if (load_type || config) {
fprintf(stderr, "-t and -C not supported\n");
exit(EXIT_FAILURE);
}
if (showconfig)
exit(EXIT_SUCCESS);
if (list)
exit(EXIT_SUCCESS);
depend = build_dep ( );
if ( !depend ) {
fprintf (stderr, "could not parse modules.dep\n" );
exit (EXIT_FAILURE);
}
if ( !depend )
error_msg_and_die ( "could not parse modules.dep\n" );
if (remove_opt) {
do {
mod_remove ( optind < argc ? argv [optind] : 0, do_syslog, show_only, verbose );
mod_remove ( optind < argc ? argv [optind] : 0 );
} while ( ++optind < argc );
exit(EXIT_SUCCESS);
return EXIT_SUCCESS;
}
if (optind >= argc) {
fprintf(stderr, "No module or pattern provided\n");
exit(EXIT_FAILURE);
}
if (optind >= argc)
error_msg_and_die ( "No module or pattern provided\n" );
rc = mod_insert ( argv [optind], argc - optind - 1, argv + optind + 1, autoclean, quiet, do_syslog, show_only, verbose );
exit(rc ? EXIT_FAILURE : EXIT_SUCCESS);
return mod_insert ( argv [optind], argc - optind - 1, argv + optind + 1 ) ? \
EXIT_FAILURE : EXIT_SUCCESS;
}